The Sword of Kahless is a rare Legendary Artifact — Equipment card from Star Trek Commander (TRC), collector number 357.
Equipped creature gets +2/+2 and has "Whenever this creature attacks, look at the top five cards of your library. You may put a Klingon or Warrior creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order." Equip {2}